High-confidentiality ultrahigh-frequency RFID (radio frequency identification) system applicable to intelligent traffic information sensing
A technology of information perception and intelligent transportation, applied in the field of high-security UHF RFID system, can solve the problems of high cost of UHF RFID technology, weak UHF RFID industry, and too early for large-scale application, and achieve long-distance reading improvement , Realize effective authentication and prevent the effect of large-scale "cloning"
Inactive Publication Date: 2017-08-15
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0003] At this stage, UHF RFID technology has disadvantages such as high cost and insufficient security, which restrict the development of the Internet of Things
In addition, my country's UHF RFID industry is still relatively weak, and it is too early for large-scale application
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Embodiment 1
[0039] The high-secrecy ultra-high-frequency RFID system based on the distributed key of the present invention includes an ultra-high-frequency RFID reader-writer and an RFID tag. The UHF RFID reader / writer includes a UHF RFID reader / writer analog front-end chip, an UHF RFID reader / writer SoC chip, a method for authenticating and accessing the background server of the Internet of Things application system, and a dynamic encrypted read Tag method; the RFID tag integrates a corresponding error correction coding circuit.
[0040] Further, the analog front-end chip of the UHF RFID reader integrates a power amplifier with a transmission power of 20dBm on the basis of a direct up-conversion transmitter structure and a zero-IF quadrature receiver structure, realizing tag remote reading.
[0041] Further, the UHF RFID reader uses a high-linearity and low-noise passive mixer as a radio frequency front end, which effectively solves the carrier leakage problem of the transmitter and gre...
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The present invention discloses a high-confidentiality ultrahigh-frequency RFID (radio frequency identification) system applicable to intelligent traffic information sensing. The system includes a server, an ultrahigh-frequency RFID reader-writer and an RFID tag; the ultrahigh-frequency RFID reader-writer transmits signals to the RFID tag so as to obtain tag data; the analog front-end chip of the ultrahigh-frequency RFID reader-writer integrates a high-power amplifier and adopts a passive mixer as an radio frequency front end, so that the remote reading of the tag can be realized, and the sensitivity of the reader-writer can be greatly improved; the SoC chip of the ultrahigh-frequency RFID reader-writer integrates an ECC encoding and decoding circuit, and therefore, read-write error control efficiency can be improved, and tag costs can be reduced; with the ultrahigh-frequency RFID reader-writer adopted, a method for performing authentication to access the server can be realized, and therefore, sensitive information leakage can be effectively prevented; a corresponding error correction coding circuit is integrated in the RFID tag, and therefore, the success rate of the reading of the reader-writer can be improved; and when reading the tag, the reader-writer adopts a dynamic encryption method, and therefore, the tag can be effectively prevented from being cloned on a large scale.
Description
technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a high-secret ultra-high frequency RFID system suitable for intelligent traffic information perception. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology that automatically identifies targets and obtains relevant data through radio frequency signals. RFID can identify multiple targets, and can also identify moving targets. According to different operating frequencies, RFID systems can be divided into low frequency (125kHz), high frequency (13.56MHz), ultra high frequency (860MHz ~ 930MHz) and microwave system (2.45GHz). Among them, the ultra-high frequency (UHF) RFID system generally uses the principle of electromagnetic backscattering to realize the communication between the reader and the electronic tag, which can read multiple electronic tags at one time, has strong penetrability, an...
Claims
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IPC IPC(8): G06K17/00
CPCG06K17/0022
Inventor 李千目黄甜甜戚湧王印海侯君
Owner NANJING UNIV OF SCI & TECH